Carbureter.



II. II. CASI'AGNEII.

GARBURETER.

APPLICATION FILED IIAR. 18. I9Is.

19%53993@ l men-Ie@ zIan. 15,1918.

2 SHEETS-SHEET l- A. R. CASTAGNER.'

` GARBUBETER. APPLICATION FILED MAR. I8, |916,

i@ I Patented m1519118.

2 SHEETS-SHEET 2.

rrf s raj o 'non ARTHUR It. cnsTAGNEl-t, or MINNEAPOLIS, MINNESOTA.

CARBURETER.

while especially designed for use in connection with engines o f motorcycles, it will be 'evident as the description proceeds that the carbureter is'use'ful also in connection with any internal combustion engine.

. The object of the invention is to produce a carbureterlwhich is particularly economi- -I calin the consumption of fuel, which is especially adapted for quick acceleration and certain parts of which ymay be adjusted to suit the particular engine in connection with which it is employed.- A further object in view is `to provide a carbureter having the characteristics'above indicated, with a hot air manifold by means of which hot air may be 'supplied -to the main and auxiliary 'air intake openings of the carbureter. One 'of the principal objects of the invention is to produce in connection with the main and auxiliary air intake openings and the mixture outlet opening, a throttle valve ofwnovel construction and arrangement .and having 'a compound movement and also associated with the lfuel regulating valve in such manner that the main and auxiliary air inletv openings andthe mixture outlet opening are simultaneously opened and closed and the -fuel inlet valve shifted, in

order that a proper mixture of air and hyj drocarbon may be obtained under all adjust- A ments of the throttle valve in accordance- 10 with the demands of the engine.

With vthe above and other objects in'view, the invention consists in the novel construc- 4tion,`combination and arrangement of parts, as herein described, illustrated and claimed.

In the accompanying drawings Figure 1 is a diametrical section through a carbureter embodying the present invention. s 7 I.

Fig. 2 is a detail perspective-view/@ofthe throttlevalve. p Fi 3 is asimilar view ofthe lciarbureting chain er and the fuel trap. i.

Speccation of Letters Patent. Patented Jan; 1.5, 1918-.` Application ined March 1s'191e. serial No. 85,122. I

Fig-4 is a detail view of the throttle acj tuating roller, and the adjusting means therefor.

Fig. 5 is a detail perspective view of the fuel nozzle.

Fig'. 6 ijs-af view partly in section and partly in elevation showing the heater which -connects with the manifold. controlling the supply of air to the'main and auxiliary air inlet vopenings of the carbureter. f

The carbureter 'contemplated in this invention comprises the main body section or bowl 1 which incloses, and forms -the fuel.

chamber' 2 the same being normally closed at the top by means of a cap section 3. The central portion of the cap 3 is depressed to form acup-shaped portion 4- lying within the fuel chamber 2 and also an internally threaded lneck 5into which is screwed the upper threaded portion of l a carblfreting chamber 6 which gradually increases'in size toward its lower end where it passes through a central opening 7 in the bottom of the bowl or fuel chamber 2. The carbureting a flange 8 which seats against the bottom of the bowl or fuel chamber 1 and forms a metrically extending web 9 anda depending tubular nozzle extension 10. The bore of the extension 10 is extended through the chamber 6 isformed at tslower end-with.,

web 9 as shown in Fig. jl and is internally threaded vto receive a screw threaded plug 11 into which/is screwed the lower end ofl a tubular jet or nozzle 12.- .The-nozzle 12 extends upwardly within the carbureting chamber 6- and-has its upper end enlarged and of ycylindrical formation as indicated at 13, said enlarged portion of the nozzl'e being formed in the underside thereof with air inlet ports 14. A fuel regulating valve .15 of the needle type is shown as coperating with the discharge end of the nozzle 12 and controlled by means hereinafter described. Fuel inlet ducts 16 extend through thel web 9 of the carbureting chamber 6 as shown in Fig. l to permit the fuel to enter the""'extens ion 10.` The. lower end of the tubular extension 10 is threaded and passes through a mai'i. air tube or horn 17 where it receives a clamping nut 18 that holds the tube or horn 17 tightly against the bottom of the bowll. A high speed fuel regulating valve'19,`preferably ofthe needle type, is threaded through the nut 18 and provided withA a milled head 2O or the equivalent thereof, The valve 19 coperates with the receiving end of thenozzle 12 and regulates the amount of fuel which may pass t0 the nozzle'.

Connected directly to the cap `3 of the l' bowl 1 is a throttle valve chamber 21 the same being shown as provided with a flange 22 secured in any convenient manner to the cap 3. The throttle valve chamber or casing 21 is provided at one side with a mixture outlet 23 and at a substantially diametrically opposite point with an auxiliary air 4 inlet 24 in'which is arranged lan auxiliary air regulating valve 25 lshown as of the butteriiy type. The top of the throttle valve chamber 21 is practically closed by an end wall 26 formed, however, with a central opening to receive the tubular stem 27 of a hollow cylindrical or tubular throttle valve 28 which is illustrated in detail in Fig. 2.

. The throttle valve chamber' is in the form of a hollowy cylinder,'as well as the throttle valve 28 and the vlatter is adapted to be oscillated by a throttle lever 29 fast on the tubular stem 27 of said throttle and arranged exteriorly of the valve casing. The throttle valve is formed in one side thereof with a mixture outlet opening 30 and about opposite `said opening 30 is a'n auxiliary air inlet opening 31, the openings 30` and 31 adapted to respectively and .simultaneously register with the mixture outlet port 23 and the auxiliary air inlet 24.

The throttle valve stem 27 is-internally threaded to receive a threaded and longif tudinally adjustable bushing 32 connected at `its lower extremity to the valve 15 above .referred to, the result of which is that when the throttle valve 28 is moved lengthwise of the valve chamber 21, the fuel regulating valve 15 is correspondingly and. quickly shifted. A tensioning spring 33 is mounted 32 and bears at one end a pressure against the head of the throttle valve 28 to assist in returning the latter to its closed position.

valve The throttle valve 28 has the lower-end thereof contracted in size to form a frustoconical portion 37 formed with a number'of air inlet ports 38 and is`t hen further contracted to forin a conical valveface 39 movable toward and away from a valve seat 40 formed at the junction between the upper extremity of the carbureting chamber 6 andl the depressed central portion of the cap 3.

In order to effect a reciprocatory movement of the throttle valve simultaneously with the oscillatory movement thereof, the

throttle valve is provided with a cam way 41 which receives a roller 42 journaled on an oscillatory'carrier 43 journaled in a bearing opening 44 in an offset portion of the throttle valve easing 21. rll`he carrier 43 is provided with an operating arin 45 having a handle 46 and a slotted segment 47 through which passes a headed pin* or stud 48 on which is mounted a tension spring 49 which bears against the segment 47 to hold the roller 42 in a certain fixed position while permitting said roller to be adjusted for the purpose of enabling the reciprocatory throw of the throttle valve to be adjusted and regulated. It willv be apparent that as the throttle valve is oscillated the roller 42 operating in the cam way 41 will` cause a reciprocatory movement of the throttle valve thereby shifting the valveface 39 toward and away from the valve seat 40 to accordingly increase or diminish the volume of air passing from the carbureting chamber 6 around the voutside of the lower portion of the throttle valve. Any air passing by the valve face 39 will be admitted through the ports 38 to the interior of ,the throttle valve.

50 represents the automatic cut-ottl valve which controls the fuel supply connection 51 leading to the carbureter, 52 represents the lever for operating the valve 50, and 53 represents the float in the fuel chamber 2 which is Vconnected `to the lever 52, the float and the parts controlled lthereby being of the usual construction and 1arrangement `found in many ioat feed carbureters.

In cold weatherl it is found desirable to employ a heater shown as embodying .a hollow cylindrical jacket 54 the end walls of which are formed with openings to receive the exhaust pipe 55 of-the engine.

The heateris provided with air vinlet perfoi-ations 56 and with a hot air outlet neck 57 to which is connected a pipe 58 preferably of the flexible type, the same being connected at its dischargeend to" the threaded end portion 59 of a manifold 60 which is connected at 61 to the auxiliary air inlet 24 and connected at 62 to the main air inlet tube or horn 17. A

.From the foregoing description, taken in vconnection with the accompanying drawings, the operationof the carbureter will now be understood. When the carbureter is throttled down and the engine is operating at low speed, the throttle valve is in its closed or nearly closed position, thereby closing the auxiliary air inlet and the mixture outlet and also preventing the main air supply from passing by the valve face 39.. 1n this position also the fuel regulating valve is almost closed. -rlhe air at this time Vis admitted through the main air tube or horn 17 and passes on opposite sides of the web 9 intothe carbureting chamber 6, it being understood that suction in said chamber is produced by the operation of the piston or pistons of the engine and it being also understood'that the port 30 is so designed as to afford Athe necessary communication between the interior of the valve and the intake pipe or manifold of the engine.

ea By operating the throttle lever 29, the

throttle valve 28 isoscillated or partially turned on its longitudinal axis thereby further opening the mixture outlet port of the valve and auxiliary air inlet port thereof,

Simultaneously with this movement of the throttle valve, the valve face 39 is moved away from the valve seat 40 allowing additional air to pass from the carbureting chamber vthrough the ports 38 into the throttle valve. Also simultaneously with this movement of the throttle valve, the fuel regulating valve 15 is moved away from its seat in the nozzle 12 thereby admitting of the feed of a greater amount of fuel. As previously noted, the parts suoli as .the throttle valve, the fuel regulating valve 15 and the butterfly regulating valvev25 are adjusted in accordance with the particular engine in connection with which the carbureter as a whole is used. The valve 19 is for the purpose of regulating what is known asV the high speed adjustment, the `valve 19 serving. to regulate the quantity of fuel which is allowed to pass through the spray nozzle 12. A certain proportion of the air in the carbureting chamber 6- is drawn through the perforationsv or ports 14 in the to obtain the greatest efficiency and economy in accordance with the engine in connection with which the carbureter is used and'furthermore, the carbureter as a whole isV adapted for both summer and winter use and the entire mechanism thereof, after the carbureter has .been adjusted, is controlled by thev single throttle lever 29. Furtherggg more, ,the flow of fuel is smooth and constant owing to the large air channels and a reserve supply of fuel is continually avail able for acceleration purposes.

Having thus described my invention, I claim 1. In a carbureter, the combination of a carbureting chamber, a main air inlet at the bottom of said carbureting chamber, a throttle valve chamber above and in communicalar air space between the extended portion of the throttle valve and the inner surface ofthe mixing chamber, a fuel nozzle discharging within said extended portion of the throttle valve, and ya fuel valve`coperating with said fuel nozzle and carried by said throttle valve.

2.' In acarbureter, the combination of a carbureting chamber, a main air inlet at the bottom of said carbureting chamber, a

- throttle valve chamber above and in communication with said carbureting chamber and formed with laterally opposed auxiliary air inlet .and mixture outlet openings, -an oscillatory cylindrical throttlel valve formed with auxiliary air inlet and mixture outlet opensponding openings of the throttle valve chamber, said throttle valve having a tubular portion thereof extended into the carbu- Qings adapted to `register with the corre- Y reting chamber, a fuel nozzle dischargng` within said extended portion of the throttle valve, the upper end of ,said fuel nozzle being of enlarged tubular formation and lying within the extended portion of the throttle valve, and a fuel valve coperating with j said fuel nozzle and carried by said throttle valve. 1 'k 3. ln a carbureter, the combination of a carbureting chamber, amain air inlet at the bottoml of said carburetingchamber, a throttle valve chamber above and in communication with said carbureting chamber and formed with laterally opposed auxiliary air -inlet and mixture outlet openings, an oscillatory cylindrical throttle valve formed with auxiliary air inlet and mixture outlet openings adapted -to register with the corresponding openings of the throttle valve chamber, said' throttle valve having a tubular portion thereof extended into thecarbureting chamber, a fuel nozzle discharging lll@ within said extended portion ofthe throt-v chamber,"said throttle valve having a tubularA portion thereof extended into the oartle valve, and a fuel valve coperating with' said fuel nozzle and flexibly throttle Valve.

carried by said t 4. In av oarbureter,`the combination of a4 .carbureting-charnber, a main air inlet at the bottoniA of said carbureting chamber, a

throttle valve chamber above and in communication with said carbureting chamber bureting chamber', a fuel nozzle discharging within said extended portion of the throttle valve, and a fu'el valve cooperating with said fuel nozzle and carried by said throts tle yalve, said throttle valvebeingformed with aY plurality of air inlet perfora-tions located above the upper end of the fuel nozzle.

la. In a carburetor, the combination of a ca rburetingchamber, a main air inlet at .the

'Y bottom of- Said carbureting chamber, a throt- A tlev valve chamberabove and m Communlca-I tion with said carbureting chamber and Vrformed with laterally opposed auxiliaryair `Ainlet and mixture outlet openings, an oscillatory cylindrical throttle valve formed with auxiliary air inlet and mixture outlet open- V4ings adapted to register with the corresponding openings of the throttle valve chamber, said throttle valve having a tubular portion thereof extended into the carbureting chamber, a fuel nozzle discharging within said extended portion of the throttle valve, and a fuel valve cooperating with said fuel nozzleA and carried by said throttle'valve, said auxiliary air inlet an-d mix- 'ture outlet openings being located above the discharge end of the fuel nozzl 6. In a carbureter, the 'combination ofva air inlet andA mixture outlet opening"s,`a4

fuel nozzle-having an enlarged tubular upper end formed with'primar'y air inlet ports, a fuel valve cooperating with said nozzle and carried by said throttle valve, means for oscillating said throttle valve,`and means for imparting an up and downmovement theretoduring the oscillatory movement thereof, said throttle valve having a reduced tubular lower end lying between and in spaced relation to the enlarged tubular upper part of the fuel nozzle and the Wall of the carbureting chamber, 'the latter being formed with a valvev seat,` and'the throttle valve having a valve face' movable toward and away from said valve seat.

In testimony whereof I affix in presence of two Witnesses.

ARTHUR R. CASTAGNER. Witnesses: l

vE. MAUDE 'E'rHRDGm 'I-I. P. SAUNDERs.

my signature 

